Set of hollow core shots

ABSTRACT

A plurality of differently weighted hollow balls, or shots form a set for use in training shot putters. All the hollow balls of a set have the same diameter at their outer wall surface, and each ball in the set has an inner diameter different from each other ball in the set. The weight of a ball is determined by the inner diameter thereof. This set of hollow balls, or shots permits a shot putter to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls. Each ball is provided with a pair of diametrically opposed holes communicating with the hollow core thereof for permitting access thereto and for selectively arranging material in the hollow core for increasing the weight of the ball for overweight training. Further, each ball may be provided with a coloring and indicia that is different than the coloring and indicia of each other ball.

United States Patent 1191 Gillett 1 Sept. 18, 1973 1 SET OF HOLLOW CORE SHOTS [76] Inventor: Orval B. Gillett, PO. Box 702,

Porterville, Calif. 93257 [22] Filed: Feb. 10, 1972 [21] Appl. No.: 225,114

[52] U.S. Cl 272/59 B [51] Int. Cl A63b 69/00 [58] Field of Search 272/59 B, 84;

273/58 R, 58 B, 58 BA, 58 H, 59 B, 59 R, 60 R, 63 R, 63 C, 63 E, 106 R, 118 R, 128 A; 72/348 [57] ABSTRACT A plurality of differently weighted [hollow balls, or shots form a set for use in training shot putters. All the hollow balls of a set have the same diameter at their outer wall surface, and each ball in the set has an inner diameter different from each other ball in the set. The weight of a ball is determined by the inner diameter thereof. This set of hollow balls, or shots permits a shot putter to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls. Each ball is provided with a pair of diametrically opposed holes communicating with the hol- 5] References cued low core thereof for permitting access thereto and for UNITED STATES PATENTS selectively arranging material in the hollow core for in- 984,721 2/1911 Titus 272/84 creasing the weight of the ball for overweight training. 1,288,695 12/1918 Schuyler 273/118 R Further, each ball may be provided with a coloring and 1,118,727 9 Bibeault 273/59 R indicia that is different than the coloring and indicia of 2,151,030 3/1939 Hinsen 273/106 R each other balL 1,986,687 l/l935 Tenison 272/59 B 2,902,023 9/1959 Waller 273/58 8 Primary Examiner-Richard C. Pinkham Assistant Examiner-Harry G. Strappello 6 Chums 5 Drawing Figures Att0rneyHarvey B. Jacobson SET OF noLLow cone snors BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates generally to hollow core shots for putting, and in particular to a set of differently weighted balls, or shots for use in training shot putters by permitting same to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls.

2. Description of the Prior Art Shots are known, as shown in, for example, U. S. Pat. Nos. 1,036,138 and 1,986,687, which are constructed from a hollow shell filled with a material such as lead. These known constructions, however, are only concerned with maintaining the proper balance and weight of the shot.

U. S. Pat. No. 3,181,864 discloses a variable weight ball which may be adapted for shot putting. This ball, however, is a complex arrangement of a plurality of nesting, hemispherical shells, wherein the weight of the ball may be varied by removing or adding shells. The construction of such a ball is complex and expensive. Further, if it is desired to change the weight of the ball frequently, it may become very time-consuming and objectionable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide balls, or shots adapted for use in training shot putters and permitting same to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls, or shots.

It is another object of the present invention to provide a ball, or shot for use by shot putters whichis simple in construction and inexpensive to manufacture.

These and other objects are achieved according to the present invention by providing a plurality .of differently weighted hollow balls forming a set for use in training shot putters. All of these hollow balls have the same diameter at an outer wall surface thereof, and each ball in the set has an inner diameter different from each other ball in the set. The weight of a ball is determined by the inner diameter thereof.

According to a preferred embodiment of the present invention, the inner diameter of each ball in the set is defined by a substantially spherical inner wall surface which further defines a hollow core. Each ball is provided with a pair of diametrically opposed holes communicating with the hollow core for permitting access thereto for selectively arranging material in the hollow core for increasing the weight of the ball for overweight training.

Advantageously, each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in the set. a

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout.

I BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a set of six hollow core shots according to the present invention.

FIG. 2 is a plan view showing a hollow core shot ac cording to the present invention and drawn to a larger scale than FIG. 1.

FIG. 3 is a sectional view taken generally along the line 3-3 of FIG. 2.

FIG. 4 is a sectional view similar to FIG. 3, but showing a heavier shot according to the present invention.

FIG. 5 is a sectional view showing the shot of FIG. 4 provided with a material filling its hollow core.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring first to FIG. I of the drawings, a plurality of differently weighted hollow balls 10 are shown forming a set 11. The particular set 11 illustrated has six balls 10. Balls 10 ofa given set 11 have the same diameter at their outer wall surface, and each ball 10 in a set 11 has an inner diameter different from each other ball in that set 11. The weight of a ball 10 is determined by its inner diameter. Set 11 permits a shot putter to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls 10.

Referring now to FIGS. 2 and 3 of thedrawings, each ball 10 has a substantially spherical outer wall surface 12 formed by a wall 13 and defining the outer diameter of ball 10, and a substantially spherical inner wall surface 14 defining the inner diameter of hollow ball 10.

Wall surface 14 further defines a hollow core 16 of ball Each ball 10 is provided with a pair of diametrically opposed holes 18 which communicate with hollow core 16 for permitting access to hollow core 16 and for selectively arranging material in hollow core 16 for increasing the weight of ball 10 for overweight training.

Further, each ball 10 is provided with a coloring and an indicia 20 that is different from the coloring and indicia of each other ball. See FIG. 1 in this regard.

As can be readily seen by comparing FIG. 3 with FIG. 4 of the drawings, the thickness of wall 13 may be changed by varying the inner diameter defined by inner wall surface 14. Decreasing this innerdiameter will make the ball 10 heavier. Thus, in a simple manner the weight of a ball 10 may be varied, while retaining the balance thereof.

FIG. 5 shows the ball 10 illustrated in FIG. 4, but with a material such as lead or epoxy putty filling hollow core 16. This permits a ball 10 to be used for overweight training.

If desired, plugs (not shown) may be inserted into holes 18 and retained there in a known manner. Advantageously, the indicia 20 may be marked on the outer surface of the plugs.

Balls 10 according to the present invention permit the development of a fast arm and increased strength by starting with the lesser weight balls 10 and working up to the heaviest weight ball 10. For example, the balls 10 may start 6 pounds under the official shot put weight, which is l2 pounds for high school and 16 pounds for college, and work up to the official weight at 1 pound intervals. The numerals 6 to 11 on the respective balls 10 shown in FIG. 1 indicate the weight thereof in pounds) Since the college shot is larger in outer diameter than the high school shot, at least two different outer diameters of balls 10 is necessary.

' By using the correct weight ball 10 for the strength of the individual, perfect form may be developed. Thus,

a set 11 of balls according to the present invention meets the individual needs of all persons wishing to participate in the shot put event.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

What is claimed as new is as follows:

1. A plurality of differently weighted hollow balls forming a set for use in training shot putters, all the hollow balls of a set having a same diameter at an outer wall surface thereof and each ball in the set having an inner diameter different from each other ball in the set, the weight of the ball being determined by the inner diameter thereof for permitting a shot putter to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls.

2. A structure as defined in claim 1, wherein the inner diameter of each ball is defined by an inner wall which further defines a hollow core.

3. A structure as defined in claim 2, wherein each ball is provided with a pair of diametrically opposed holes communicating with the hollow core for permitting access thereto and for selectively arranging material in the hollow core for increasing the weight of the ball for overweight training.

4. A structure as defined in claim 3, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in a set.

5. A structure as defined in claim 1, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in a set.

6. A structure as defined in claim 2, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in the set. 

1. A plurality of differently weighted hollow balls forming a set for use in training shot putters, all the hollow balls of a set having a same diameter at an outer wall surface thereof and each ball in the set having an inner diameter different from each other ball in the set, the weight of the ball being determined by the inner diameter thereof for permitting a shot putter to progress through a scientific weight training program in the art of shot putting by using increasingly heavier balls.
 2. A structure as defined in claim 1, wherein the inner diameter of each ball is defined by an inner wall which further defines a hollow core.
 3. A structure as defined in claim 2, wherein each ball is provided with a pair of diametrically opposed holes communicating with the hollow core for permitting access thereto and for selectively arranging material in the hollow core for increasing the weight of the ball for overweight training.
 4. A structure as defined in claim 3, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in a set.
 5. A structure as defined in claim 1, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in a set.
 6. A structure as defined in claim 2, wherein each ball is provided with a coloring and indicia that is different from the coloring and indicia of each other ball in the set. 